Chuck for bushings



Nov. 12, r1929. G. F. YAGER l`,734,989

CHUCK FOR BUSHINGS Filed Oct. 10, 1927 Patented Nov. 12, 1929 f y 1,734,989

UNITED STATES PATENT oEEicE GEORGE F. YAGER, OF TOLEDO, OHIO, ASSIGNOR TO THE kBUNTNG; BRASS & BRONZE COMPANY, OF TOLEDO, OHIO, A CORPORATIONKOF OHIO CHUCK FOR BUSHINGS Application filed October 10, 1927. Serial No. 225,144.

This invention relates to chucks, but parably engages the expansible fingers 2, it beticularly to chucks for bushings having relaing' observed that the extension 9 is considtively thin walls which are liable to become crably shorter than the lingers 2 to provide distorted from the application oi any great suiiicient room to receive a bushing. The end 5 amount of force. or the extension 9 engages the end of the 55 An object of this invention is to provide bushing B and exerts pressure thereagainst a chuck for bushings adapted to engage the 'tot' creating sufficient friction to drive the inside thereof 'ior centering the same and to bushing. exert an endwise driving force of considerrlhe arbor is enlarged adjacent the fingers lo ably greater force than the means' centering 2 to provide Sockets 10 to receive coil springs o0 the bushings so as to avoid distortion of the ll which have their outer ends abutting metal, and at the same time providing a most against screws 12carried by the sleeve 8. Ity satisfactory and ecient holding and driving 1S apparent that the pins 12 not only provide menne, A further Object is t0 produce a an abutment for the springs 11, but also prenhnck having the new and improved features vent relative turning movement between the 65 of constructionand arrangement hereinafter sleeve 8 and arbor 1. f described. Surrounding the sleeve 8 is a split collar rlhe invention is shown by Way of illustra- 13 Which is Secured in adjusted position by tion in the accompanying drawings in which: a Screw lil. The collar 13 may be moved toy 20 Fig. lis an elevation partly in section of a any desired position along the sleeve 8, de- 70 portion of a turning machine suiiicient to i1 pending upon the stroke of the arbor and insti-nt@ the invention; and Fig, 2 is a` Seepoint at which the bushing is to be released. tion On the 1in@ 2 2 01- Fg, 1 'llie collar 13 is engaged by a fixed abutment Referring to the drawings the chuck com- 1.5 which may be part of the machine frame. e5 prises an arbor 1 having a tapered shank for These peltS are brought into engagement 75 driving engagement with a spindle which when the arbor is retracting, and operates to y may be horizontally reciprocated, as is well check the movement of the sleeve 8, thereby understood in turning machines for bushings 'permitting the' fingers 2 to withdraw for reand similar articles. The'outer end of the leasing and discharging the bushing. :ce arbor 1 is considerably reduced to receive a In operation, it is apparent that the fingers 80 bushing B, and is formed with relatively long 2 cXteud inside of the bushing B, and are exexpansible lingers 2 having internal outwardtended to properly center the bushing. The' ly tapered cam surfaces 8. Itis apparent that extension or expansion of the fingers is the lingers extend into the bushing B, and caused by the lugs 6 abutting against the may be expanded into engagement with the Sleeve 8 and consequent wedging of the head 85 wallsy thereof for accurately centering the 5 against the taper surfaces 3. End pressure same. is exerted on the bushing by the sleeve 8, and For forcing the fingers 2 outwardly kinto this pressure is considerably greater than the engagement with the bushing B, an expander extending or expanding pressure of the iin- 4i* is disposed between the lingers and is gers 2, so that liability of distorting the walls 90 formed with tapered head 5 engageable with ofthe bushing B is materially reduced. As the cani surfaces 3 for wedging the lingers above explained, when the arbor retracts outwardly. The expander l has ak shank (nieves to the left, Fig. 1) the collar 13 comes and lugs 6 radiate from the expander shank in Contact with the traine 15 and causes the 45 at intervals from the inner end portion. A release of the bushing. 95 screw k7 on which the expander has limited Similar chucks are shown in the drawings sliding movement extends therethrough, and, on opposite sides of the bushing B, and alis screwed into the arbor 1. f though'this is a very satisfactory manner oi" Fitting over the arbor 1. 's a sleeve 8 prooperating the bushing, it is not necessary bevided with a reduced extension 9 which slidcause another chuck might be used with the 100 fri chuck above described. I therefore do not desire to restrict the invention to such combination nor to the arrangement shown on the drawing, becauseV other arrangements maybe resorted to Without departing from the purview of the invention. It isfurther to be understood that the above description is given by Way of illustration and not of limitation, and other changes in details of construction and arrangement may be effected Without departing from the invention, as defined in the ioliovving claims.

What I claim as new and desire to secure by Letters Patent is:

l. In a device of the class described, an arbor having enpansible lfingers projecting from an end thereof and adapted to extend into a bushing for centering the same, an expander member Within said fingers for spreading the same, a sleeve forming an abutment for said expander and having a reduced extension slidable on said fingers, means to prevent turning oi the sleeve relatively to said arbor, said reduced extension being adapted to exert end pressure on the bushing for rotating thereof.

2. In a device of the class described, a Chuck having expansible fingers for engaging the inside oi' a bushing to center the same, means to expand said fingers, rotatable means to exert an end pressure on the bushing, and means to cause relative movement of said fingers and said rotatable means to eject the bushing therefrom. Y

3. In a device of the class described, a rotatable andV reciprocable arbor, means eX- tensible inside a bushing and adjustableto center a bushing, ak sleeve iitting over said centering means or'exerting an end pressure on the bushing, an abutment for4 the opposite end of the bushing, and means to release said centering means.

4f. in a device oi the class described, a ro tatable and reciprocable arbor, means eXtensible inside a bushing and adjustable to center a bushing, a sleeve fitting over said centering means for exerting an end pressure on the bushing, an abutment for the opposite end of the bushing, a collar adjustable on said sieeve, and a iixed abutment against which said coilar strikes for arresting the movemenfj of said sleeve, thereb57 to release the bushing.

5. a device of the class described, a ro*- tatable and reciprocable arbor, enpansible means on said arbor to project into a bushing for centering the same, means to create an end pressure of greater force than the torce oi said :ipan'sible means, and means lto release the bushing yfrom said expansible means.

n testimony .vhereof I have hereuntoY signet. my name to this specification.

GEORGE F. YAGER. 

